National Bank Open: Elise Mertens vs Anna Bondar

Platform comparison

Market context

Polymarket is pricing this contract at **100% YES**, which means the market is treating **Elise Mertens** as the overwhelmingly likely player to advance against **Anna Bondar**. On-chain, the position is held through **USDC** on **Polygon**, with the outcome ultimately determined by the match result rather than the pre-match odds; if the match is not played, ends level, or is delayed more than seven days past the scheduled date without a winner, the contract flips to **50-50** under the event rules.

The live tennis context still points in Mertens’s favour. She leads the head-to-head **2-0** in some stat feeds, while other match databases record a single completed meeting in Toronto in 2022, won by Mertens in straight sets; either way, the matchup record is cleanly positive for her. Tennis.com lists Mertens at **No. 23** and Bondar at **No. 77** in singles ranking for this event, and projects Mertens as the winner at **72%**, which is consistent with a market that is effectively fully one-sided.[1][2][13][14]

For traders, the key catalysts are procedural rather than speculative: official order-of-play updates, any last-minute withdrawal, and whether the second-round slot actually goes ahead in Toronto without weather or scheduling disruption. The market only cares about whether one player advances, so a retirement, walkover, or other incomplete match can still matter depending on how the tournament records progression; that is why the posted start time and any tournament rescheduling are more important than generic pre-match narrative. If the match is played as planned, the main dependency is simply confirmation that Mertens advances on court rather than via a cancellation scenario that would send the contract to the fallback pricing.[13][14]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.